Add min_bitrate_bps to RtpEncodingParameters.

This CL adds the field but does not implement any functionality using it.

Bug: webrtc:9341
Change-Id: I533fc7f8bc1e40207aa16b834e0d7daa60709614
Reviewed-on: https://webrtc-review.googlesource.com/78741
Commit-Queue: Åsa Persson <asapersson@webrtc.org>
Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23466}

sdk/android/api/org/webrtc/RtpParameters.java

@@ -34,14 +34,17 @@ public class RtpParameters {
     // Specific maximum bandwidth defined in RFC3890. If null, there is no
     // maximum bitrate.
     @Nullable public Integer maxBitrateBps;
+    // Not implemented.
+    @Nullable public Integer minBitrateBps;
     // SSRC to be used by this encoding.
     // Can't be changed between getParameters/setParameters.
     public Long ssrc;
 
     @CalledByNative("Encoding")
-    Encoding(boolean active, Integer maxBitrateBps, Long ssrc) {
+    Encoding(boolean active, Integer maxBitrateBps, Integer minBitrateBps, Long ssrc) {
       this.active = active;
       this.maxBitrateBps = maxBitrateBps;
+      this.minBitrateBps = minBitrateBps;
       this.ssrc = ssrc;
     }
 
@@ -56,6 +59,12 @@ public class RtpParameters {
       return maxBitrateBps;
     }
 
+    @Nullable
+    @CalledByNative("Encoding")
+    Integer getMinBitrateBps() {
+      return minBitrateBps;
+    }
+
     @CalledByNative("Encoding")
     Long getSsrc() {
       return ssrc;